Who said the 5.56MM/.223 was feeble at 450 Yards? The .22 will reach over a mile and can cause injury at that distance. Who said otherwise? What's absurd is taking on a .50 BMG rifleman at 200 yards using .22 sub-sonic out of a 10 inch carbine.at 1/4 mile will be arguing how 22lr is so dangerous at a mile. you can't have both, ya know.